I'm an amateur player who has had a late start (20 years old now 30). I started to play just a little for fun and did not put much work into it because I did mostly track and field ( Won some local competitions) but the last years I really got obsessed with batspeed. I was able to raise my batspeed from mid 60s to about 82-83 and now I got really motivated hoping to break 90 in spring.
I put some research into it and started my own blog about it. I hope I can post it here it is not selling anything or advertising and just a hobby of mine. If it is against the board rules just note me and I take it down.
Here is the program. I will do it the next 4 weeks and hope that you or your kids join in and report the results. I expect at least 5 mph of batspeed or exit speed gain. Make sure that the kids are strong kids with solid swings and warm up really well as plyometrics can be really tough on the body. I don't suggest starting that before at least age 12-13, preferably older.
is anyone interested in taking part in that experiment and train with me? I will do it and report regularly.
This is an easy program for starters. Do it 3 times a week. Note that it only should be done by players with stable mechanics, I would not start before 12-13 years old. Before that work on mechanics and other stuff.
Here is the program. Do it 3 times a week on non conscutive days:
1.extensive warmup
This is extremely important because otherwise you can get injured. Especially make sure to warm up obliques and back, I once strained my oblique doing overload/underload not warming up properly and missed half a season. So REALLY warm up.
2. The tire drill
http://batspeedfitness.com/?p=40
Do 3 sets of 10 swings at full force. Two sets of the strong side and one of the weak side to balance it out.
3. Back step turn drill
3 sets of 6 swings as hard as you can.
http://batspeedfitness.com/?p=59
4. Overload/underload training
2 rounds of 5 swings each with the light, regular and heavy bat ( 30 swings overall)
http://batspeedfitness.com/?p=31
5. Jumps for the legs
a. 2 sets of 8 vertical jumps
b. 2 sets of 10 skaters jumps.